Hairbrush



FIG. 1 shows a perspective view of my design for a hairbrush;

FIG. 2 shows a side view thereof;

FIG. 3 shows a side view rotated 90° from FIG. 2;

FIG. 4 shows a side view rotated 90° from FIG. 3;

FIG. 5 shows a side view rotated 90° from FIG. 4;

FIG. 6 shows a front end view thereof; and,

FIG. 7 shows a rear end view thereof.

The bristles are shown in dotted lines and are for environmental purposes only. They form no part of the claimed invention. 

The ornamental design for a hairbrush, as shown and described. 